TARASITIC WORMS IN DOMESTICATED ANIMALS 270 



developed tooth in the month portion. A similar worm 

 occurs in cattle, B. Pidchotomum, and the two species are 

 only distinguishable on fine morphological detail. 



In the caecum and colon of sheep and cattle, nematode 

 worms of the Oesophagostome species occur with great 

 frequency, in fact are rarely absent. The adult worms 

 are very white in colour, about f long, and twisted at 

 the tail end usually. The larval form occurs in the in- 

 testinal wall forming small nodules containing a green 

 cheesy material, and which later becomes calcareous. The 

 sheep harbours OesopJiagostum ColumManum, and cattle, 

 0. Radiatum. 



The dog's intestine contains several species of tape 

 worm and two of round. Of the tapeworms, two are 

 of great importance, Taenia Echinococus and T. 

 Marginata. The former is a tiny armed tapeworm, about 

 Y^ long, and having only four segments. Its intermediate 

 stage occurs in cattle, sheep and other animals, and pro- 

 duces large cysts in the liver, lungs, etc., causing the 

 organs to be useless for food. T. Marginata has its inter- 

 mediate stage in sheep and goats, and in buck as well, 

 producing the well known bladder worms, known to 

 every butcher. These jelly like bladders are attached to 

 the omentum or mesentery, and may be present in large 

 numbers. The most common round worm of the dog is 

 Ascaris Marginata, a white worm about 2'' or more in 

 length, often present in large numbers and producing fits 

 and convulsions in puppies. 



There are about 75. species of common parasitic w^orms 

 found in the domesticated animals in South Africa and 

 the list given only refers to some of the more common 

 ones. 



luj LIBRARY 



